| 1 | #! /bin/sh
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| 2 | # This program is part of GNU tar
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| 3 | # Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc.
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| 4 | #
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| 5 | # This program is free software; you can redistribute it and/or modify
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| 6 | # it under the terms of the GNU General Public License as published by
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| 7 | # the Free Software Foundation; either version 1, or (at your option)
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| 8 | # any later version.
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| 9 | #
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| 10 | # This program is distributed in the hope that it will be useful,
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| 11 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | # GNU General Public License for more details.
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| 14 | #
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| 15 | # You should have received a copy of the GNU General Public License
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| 16 | # along with this program; if not, write to the Free Software
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| 17 | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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| 18 | # 02110-1301, USA.
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| 19 |
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| 20 | PROGNAME=`basename $0`
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| 21 | CONFIGPATH="$SYSCONFDIR/backup"
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| 22 | REMOTEBACKUPDIR="$SYSCONFDIR/tar-backup"
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| 23 | CONFIGFILE=${CONFIGPATH}/backup-specs
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| 24 | DIRLIST=${CONFIGPATH}/dirs
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| 25 | FILELIST=${CONFIGPATH}/files
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| 26 | LOGPATH=${CONFIGPATH}/log
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| 27 |
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| 28 | # Default functions for running various magnetic tape commands
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| 29 | mt_begin() {
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| 30 | $MT -f "$1" retension
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| 31 | }
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| 32 |
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| 33 | mt_rewind() {
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| 34 | $MT -f "$1" rewind
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| 35 | }
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| 36 |
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| 37 | mt_offline() {
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| 38 | $MT -f "$1" offl
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| 39 | }
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| 40 |
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| 41 | mt_status() {
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| 42 | $MT -f "$1" status
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| 43 | }
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| 44 |
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| 45 | # The main configuration file may override any of these variables
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| 46 | MT_BEGIN=mt_begin
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| 47 | MT_REWIND=mt_rewind
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| 48 | MT_OFFLINE=mt_offline
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| 49 | MT_STATUS=mt_status
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| 50 |
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| 51 | # Insure `mail' is in PATH.
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| 52 | PATH="/usr/ucb:${PATH}"
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| 53 | export PATH
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| 54 | # Put startdate in the subject line of mailed report, since if it happens
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| 55 | # to run longer than 24 hours (as may be the case if someone forgets to put
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| 56 | # in the next volume of the tape in adequate time), the backup date won't
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| 57 | # appear too misleading.
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| 58 | startdate="`date`"
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| 59 | here="`pwd`"
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| 60 | # Save local hostname
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| 61 | localhost="`hostname | sed -e 's/\..*//' | tr A-Z a-z`"
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| 62 |
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| 63 | # Produce a diagnostic output
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| 64 | message() {
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| 65 | if [ "$VERBOSE" != "" ]; then
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| 66 | if [ $VERBOSE -ge $1 ]; then
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| 67 | shift
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| 68 | echo "$@" >&2
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| 69 | fi
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| 70 | fi
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| 71 | }
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| 72 |
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| 73 | # Bail out and exit.
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| 74 | bailout() {
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| 75 | echo "$PROGNAME: $*" >&2
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| 76 | exit 1
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| 77 | }
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| 78 |
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| 79 | # Return current date
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| 80 | now() {
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| 81 | #IF_DATE_FORMAT_OK
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| 82 | date +%Y-%m-%d
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| 83 | #ELSE_DATE_FORMAT_OK
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| 84 | LC_ALL=C date | \
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| 85 | sed 's/[^ ]* *\([^ ]*\) *\([^ ]*\).* \([^ ]*\)$/\3-\1-\2/
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| 86 | /-[0-9]$/s/\([0-9]\)$/0\1/
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| 87 | /Jan/{s/Jan/01/p;q;}
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| 88 | /Feb/{s/Feb/02/p;q;}
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| 89 | /Mar/{s/Mar/03/p;q;}
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| 90 | /Apr/{s/Apr/04/p;q;}
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| 91 | /May/{s/May/05/p;q;}
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| 92 | /Jun/{s/Jun/06/p;q;}
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| 93 | /Jul/{s/Jul/07/p;q;}
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| 94 | /Aug/{s/Aug/08/p;q;}
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| 95 | /Sep/{s/Sep/09/p;q;}
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| 96 | /Oct/{s/Oct/10/p;q;}
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| 97 | /Nov/{s/Nov/11/p;q;}
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| 98 | /Dec/{s/Dec/12/p;q;}'
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| 99 | #ENDIF_DATE_FORMAT_OK
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| 100 | }
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| 101 |
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| 102 | # Bail out if we don't have root privileges.
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| 103 | test_root() {
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| 104 | if [ ! -w ${ROOT_FS-/} ]; then
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| 105 | bailout "The backup must be run as root or else some files will fail to be dumped."
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| 106 | fi
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| 107 | }
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| 108 |
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| 109 | root_fs() {
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| 110 | echo "${ROOT_FS}$1" | tr -s /
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| 111 | }
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| 112 |
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| 113 | advice() {
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| 114 | echo "Directory $1 is not found." >&2
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| 115 | cat >&2 <<EOF
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| 116 | The following directories and files are needed for the backup to function:
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| 117 |
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| 118 | 1. Directory with configuration files and file lists:
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| 119 | $CONFIGPATH
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| 120 | 2. Directory for backup log files
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| 121 | $LOGPATH
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| 122 | 3. Main configuration file
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| 123 | $CONFIGFILE
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| 124 |
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| 125 | Please, create these and invoke the script again.
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| 126 | EOF
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| 127 | }
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| 128 |
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| 129 | init_common() {
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| 130 | # Check if the necessary directories exist
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| 131 | if [ ! -d $CONFIGPATH ]; then
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| 132 | advice $CONFIGPATH
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| 133 | exit 1
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| 134 | fi
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| 135 | if [ ! -d $LOGPATH ]; then
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| 136 | if mkdir $LOGPATH; then
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| 137 | :
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| 138 | else
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| 139 | advice $LOGPATH
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| 140 | exit 1
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| 141 | fi
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| 142 | fi
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| 143 | # Get the values of BACKUP_DIRS, BACKUP_FILES, and other variables.
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| 144 | if [ ! -r $CONFIGFILE ]; then
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| 145 | echo "$PROGNAME: cannot read $CONFIGFILE. Stop." >&2
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| 146 | exit 1
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| 147 | fi
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| 148 | . $CONFIGFILE
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| 149 |
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| 150 | # Environment sanity check
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| 151 |
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| 152 | test_root
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| 153 |
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| 154 | if [ x"${ADMINISTRATOR}" = x ]; then
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| 155 | bailout "ADMINISTRATOR not defined"
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| 156 | fi
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| 157 |
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| 158 | [ x"$TAR" = x ] && TAR=tar
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| 159 | [ x"$SLEEP_TIME" = x ] && SLEEP_TIME=60
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| 160 |
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| 161 | if [ x$VOLNO_FILE = x ]; then
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| 162 | bailout "VOLNO_FILE not specified"
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| 163 | fi
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| 164 |
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| 165 | if [ -r $DIRLIST ]; then
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| 166 | BACKUP_DIRS="$BACKUP_DIRS `cat $DIRLIST`"
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| 167 | fi
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| 168 | if [ -r $FILELIST ]; then
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| 169 | BACKUP_FILES="$BACKUP_FILES `cat $FILELIST`"
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| 170 | fi
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| 171 |
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| 172 | if [ \( x"$BACKUP_DIRS" = x \) -a \( x"$BACKUP_FILES" = x \) ]; then
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| 173 | bailout "Neither BACKUP_DIRS nor BACKUP_FILES specified"
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| 174 | fi
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| 175 | if [ -z "$RSH" ]; then
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| 176 | RSH=rsh
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| 177 | MT_RSH_OPTION=
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| 178 | else
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| 179 | MT_RSH_OPTION="--rsh-command=$RSH"
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| 180 | fi
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| 181 | if [ -z "$TAPE_FILE" ]; then
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| 182 | TAPE_FILE=/dev/tape
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| 183 | fi
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| 184 |
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| 185 | # If TAPE_FILE is a remote device, update mt invocation accordingly
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| 186 | : ${MT:=mt}
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| 187 | case $TAPE_FILE in
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| 188 | *:*) MT="$MT $MT_RSH_OPTION";;
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| 189 | *) ;;
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| 190 | esac
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| 191 |
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| 192 | POSIXLY_CORRECT=1
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| 193 | export POSIXLY_CORRECT
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| 194 | }
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| 195 |
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| 196 | init_backup() {
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| 197 | init_common
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| 198 | TAR_PART1="${TAR} -c --format=gnu --multi-volume --one-file-system --sparse --volno-file=${VOLNO_FILE}"
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| 199 | if [ "x$XLIST" != x ]; then
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| 200 | TAR_PART1="${TAR_PART1} \`test -r $REMOTEBACKUPDIR/$XLIST && echo \"--exclude-from $REMOTEBACKUPDIR/$XLIST\"\`"
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| 201 | fi
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| 202 | if [ "$RSH_COMMAND" != "" ]; then
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| 203 | TAR_PART1="${TAR_PART1} --rsh-command=$RSH_COMMAND"
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| 204 | fi
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| 205 | if [ x$BLOCKING != x ]; then
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| 206 | TAR_PART1="${TAR_PART1} --blocking=${BLOCKING}"
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| 207 | fi
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| 208 |
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| 209 | # Only use --info-script if DUMP_REMIND_SCRIPT was defined in backup-specs
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| 210 | if [ "x${DUMP_REMIND_SCRIPT}" != "x" ]; then
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| 211 | TAR_PART1="${TAR_PART1} --info-script='${DUMP_REMIND_SCRIPT}'"
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| 212 | fi
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| 213 | # Set logfile name
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| 214 | # Logfile name should be in the form ``log-1993-03-18-level-0''
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| 215 | # They go in the directory `@sysconfdir@/log'.
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| 216 | # i.e. year-month-date. This format is useful for sorting by name, since
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| 217 | # logfiles are intentionally kept online for future reference.
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| 218 | LOGFILE="${LOGPATH}/log-`now`-level-${DUMP_LEVEL}"
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| 219 | }
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| 220 |
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| 221 | init_restore() {
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| 222 | init_common
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| 223 | # FIXME: Replace --list with --extract
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| 224 | TAR_PART1="${TAR} --extract --multi-volume"
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| 225 | if [ "$RSH_COMMAND" != "" ]; then
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| 226 | TAR_PART1="${TAR_PART1} --rsh-command=$RSH_COMMAND"
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| 227 | fi
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| 228 | if [ x$BLOCKING != x ]; then
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| 229 | TAR_PART1="${TAR_PART1} --blocking=${BLOCKING}"
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| 230 | fi
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| 231 |
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| 232 | # Only use --info-script if DUMP_REMIND_SCRIPT was defined in backup-specs
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| 233 | if [ "x${DUMP_REMIND_SCRIPT}" != "x" ]; then
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| 234 | TAR_PART1="${TAR_PART1} --info-script='${DUMP_REMIND_SCRIPT}'"
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| 235 | fi
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| 236 | LOGFILE="${LOGPATH}/restore-`now`"
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| 237 | }
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| 238 |
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| 239 | wait_time() {
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| 240 | if [ "${1}" != "now" ]; then
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| 241 | if [ "${1}x" != "x" ]; then
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| 242 | spec="${1}"
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| 243 | else
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| 244 | spec="${BACKUP_HOUR}"
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| 245 | fi
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| 246 |
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| 247 | pausetime="`date | awk -v spec=\"${spec}\" '
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| 248 | BEGIN {
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| 249 | split(spec, time, ":")
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| 250 | }
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| 251 | {
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| 252 | split($4, now, ":")
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| 253 | diff = 3600 * (time[1] - now[1]) + 60 * (time[2] - now[2]);
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| 254 | if (diff < 0)
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| 255 | diff += 3600 * 24
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| 256 | print diff
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| 257 | }'`"
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| 258 | clear
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| 259 | echo "${SLEEP_MESSAGE}"
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| 260 | sleep "${pausetime}"
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| 261 | fi
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| 262 | }
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| 263 |
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| 264 | level_log_name() {
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| 265 | echo "$REMOTEBACKUPDIR/${1}.level-${2-$DUMP_LEVEL}"
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| 266 | }
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| 267 |
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| 268 | # Prepare a temporary level logfile
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| 269 | # usage: make_level_log HOSTNAME
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| 270 | make_level_log() {
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| 271 | if [ "z${localhost}" != "z$1" ] ; then
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| 272 | $RSH "$1" mkdir $REMOTEBACKUPDIR > /dev/null 2>&1
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| 273 | $RSH "$1" rm -f `level_log_name temp`
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| 274 | else
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| 275 | mkdir $REMOTEBACKUPDIR > /dev/null 2>&1
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| 276 | rm -f `level_log_name temp`
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| 277 | fi
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| 278 | }
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| 279 |
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| 280 | # Rename temporary log
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| 281 | # usage: flush_level_log HOSTNAME FSNAME
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| 282 | flush_level_log() {
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| 283 | message 10 "RENAME: `level_log_name temp` --> `level_log_name $2`"
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| 284 | if [ "z${localhost}" != "z$1" ] ; then
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| 285 | $RSH "$1" mv -f `level_log_name temp` "`level_log_name $2`"
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| 286 | else
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| 287 | mv -f `level_log_name temp` "`level_log_name $2`"
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| 288 | fi
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| 289 | }
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| 290 |
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| 291 | # Return the timestamp of the last backup.
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| 292 | # usage: get_dump_time LEVEL
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| 293 | get_dump_time() {
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| 294 | ls -r ${LOGPATH}/log-*-level-$1 \
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| 295 | | head -n 1 \
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| 296 | | sed "s,.*log-\(.*\)-level-$1,\1,"
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| 297 | }
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| 298 |
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| 299 | # Do actual backup on a host
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| 300 | # usage: backup_host HOSTNAME [TAR_ARGUMENTS]
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| 301 | backup_host() {
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| 302 | message 10 "ARGS: $@"
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| 303 | rhost=$1
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| 304 | shift
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| 305 | if [ "z${localhost}" != "z$rhost" ] ; then
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| 306 | $RSH "$rhost" ${TAR_PART1} -f "${localhost}:${TAPE_FILE}" $@
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| 307 | else
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| 308 | # Using `sh -c exec' causes nested quoting and shell substitution
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| 309 | # to be handled here in the same way rsh handles it.
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| 310 | CMD="exec ${TAR_PART1} -f \"${TAPE_FILE}\" $@"
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| 311 | message 10 "CMD: $CMD"
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| 312 | sh -c "$CMD"
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| 313 | message 10 "RC: $?"
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| 314 | fi
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| 315 | }
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| 316 |
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| 317 | print_level() {
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| 318 | if [ ${1-$DUMP_LEVEL} -eq 0 ]; then
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| 319 | echo "Full"
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| 320 | else
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| 321 | echo "Level ${1-$DUMP_LEVEL}"
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| 322 | fi
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| 323 | }
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| 324 |
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| 325 | prev_level() {
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| 326 | print_level `expr $DUMP_LEVEL - 1` | tr A-Z a-z
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| 327 | }
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| 328 |
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| 329 | remote_run() {
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| 330 | rhost=$1
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| 331 | shift
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| 332 | message 10 "REMOTE $rhost: $@"
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| 333 | if [ "x$rhost" != "x${localhost}" ] ; then
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| 334 | $RSH "${rhost}" "$@"
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| 335 | else
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| 336 | $*
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| 337 | fi
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| 338 | }
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| 339 |
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| 340 | license() {
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| 341 | cat - <<EOF
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| 342 | Copyright (C) 2006 Free Software Foundation, Inc.
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| 343 | This is free software. You may redistribute copies of it under the terms of
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| 344 | the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.
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| 345 | There is NO WARRANTY, to the extent permitted by law.
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| 346 | EOF
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| 347 | }
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